Rotary plow



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I ROTARY PLOW.

Patented Sept. 12, 1893.

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M. T. HANCOCK. ROTARY PLOW.

No. 504,779. Patented Sept. 12, 1893.

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3 Sheets-Sheet 3,

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No. 504,779. Patented Sept. 12, 1893.

- INVENTO/S. TWz'ZivJ T. mam p M Uwirnn STATES PATENT OFFICE.

MILTON T. HANCOCK, OF SHREVEPORT, LOUISIANA.

ROTARY PLOW.

SPECIFICATION forming part of Letters Patent No. 504,779, datedSeptember 12, 1893.

Application filed October 20, 1892. Serial No. 449,489. (No model.)

To all whom it may concern: I

Be it known that I, MILTON T. HANCOCK, a citizen of theUnitedStates,residing at Shreveport, in the parish of Caddo and State ofLouisiana, have invented certain new and useful Improvements in RotaryPlows, of which the following is a specification.

This invention consists in certain improvements upon that shown inReissued Letters Patent No. 11,257, granted me August 9, 1892, wherebythe plows are given greater capacity and efficiency, as willbehereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof,and on which similar letters of reference indicate similar parts, Figure1 is a top or plan view of a plow embodying my said invention; Fig. 2 aside elevation of the same; Fig. 3 an end elevation, the parts beingadjusted in that relation to each other which they occupy when the plowis in operation; Fig. 4 a sectional view through one of the plowingdisks, on the dotted line 4 4 in Fig. 1; Fig. 5 a similar view throughthe front staggered wheel, on 'the dotted line 5 5 5 Fig. 6 asectionalview through the rear staggered wheel, on the dotted line 6 6; Fig. 7 alongitudinal sectional View of the swinging arm on which the rearguidewheel is mounted, and adjacent parts, and Figs. 8 and 9 views ofthe adjacent faces of said arm and the bearing to which it is united.

In said drawings the portions marked A represent the frame of the plow;13 the axle; O the guide-wheel thereon; D the rear guidewheel; E the armon which said rear guidewheel is mounted; F the plowing disks; G a seat;H an adjustinglever by which the front guide-wheel is. raised andlowered, and I a stay-rod connected to the base of the spindle on whichsaid guide-wheel is mounted, and running forward to the frame.

The frame-work A is shown as a substantially rectangular frame, with oneof the sidepieces projecting to the rear. It may be of any suitable formand size for the purpose, and it supports the bearings and attachmentsfor the mechanism of the plow.

The axle B has a crank-arm B upon one end, upon which the land-wheel Bis mounted. The crank-arm and the axle are united by means of a pin orbolt 6 which passes through a sleeve forming a part of said crank-armand said axle. The sleeve is provided with several holes, and the pin orbolt maybe shifted from one to another, and thus the crank-arm set invarying relation to the axle, and by this means the land-wheel may beadjusted to higher or lower position relatively to the frame and plowingdisks.

The staggered guide-wheel Ois mounted in much the same manner as in theaforementioned Letters Patent, and is adapted to be raised or lowered inthe same manner. The spindle Othereto, however, is a tapered spindle,and the hole therefor in the hub of the wheel is correspondinglytapered, and both should be case-hardened or chilled. This constructionadmits of the parts being cast and put together with but littlefinishing, which cheapens the construction greatly, while providing asuperior article. These staggered wheels are held onto their spindles bya linchpin 0, between which and the hub should be a washer c.

The rear staggered guide-wheel D is similar in construction andarrangement to the guide-wheel 0, except that it is set to run in thefurrow last plowed, while the wheel 0 is set to run in the furrow plowedon the preceding passage of the plow, and except that its spindle isinclined slightly to the rear so that said guide-wheel shall have aslight lead toward the portion of the ground already plowed against theside pull of the plowing disk. This last feature is quite important, asotherwise the guide-wheel would be inclined to run out, under said sidepull upon the unplowed ground. The inclination of the spindle of thefront-guide-wheel is determined by the adjustable stay-rod I, as will bepresently described.

The arm E is mounted, as willbe presently described, on the bearing Eattached to the rear end of the framework, and extends rearwardly asufficient distance, so that when it swings around, as in turning theplow in one direction, the guide-wheel will run around the plowing disk,where but one is used, or between them, where two are used, as shown;and in turning in the other direction will swing around as may berequired, all as indicated by the dotted lines in Fig. 1.

In order that this wheel may serve its purpose with the greatestcertainty, I have found it desirable to mount thereon a heavy weight,which I have shown in the form of a cast ball, E which is mounteddirectly above the point from which the spindle to the wheel projects.The arm E has a projection or project-ions 6 upon its lower face, andother projections e 6 extending horizontally from its edge. The castingE, which is bolted to the frame A, and upon which said arm is secured,has a raised portion or portions e alongside the projection orprojections e when the arm is in normal position (as shown in full linesin Fig. 1) and whereby it is ordinarily held to that position..Vhemhowever, any unusual force is applied, as when the plow is turnedaround a corner, it is sufficient to cause the projection e to travel upthe inclined faces of the raised portions 6 after which the arm and thewheel thereon are free to swivel on the pivot bolt P and travel aroundto between the plows, or such portion of that travel as the angle of theturn calls for. The arm is prevented from traveling too far by one ofits projections e e which comes in contact with the stop 8 on thecasting E, said projections being formed at such points as it is desiredshall determine the extreme limit of said travelpreferably approximatelyninety degrees from the working position. The arm is held into closecontact with the casting Eby means of the spring S, which surrounds thepivot bolt P which passes through them, said pivot-bolt being extendedto a considerable height above said arm for this purpose. The upperend-of said bolt is screw-threaded, and a nut and cap are placedthereon, by which the tension of the spring may be adjusted.

The plowing'disks F are mounted on axles fwhich extend through them andcastings F, which latter are firmly bolted to the frame A. Said axles fhave flanges f on the ends which fit against the rearside of the plowingdisks-F, and serve as a seat or support therefor. The disks and theaxles are secured together by bolts F which are provided with preferablyround heads f which fit inside the disks F, and upon the other end withnuts f The axles are slightly longer than the distance through thecastings F, and washers f which rest against the ends of said axles maythus be screwed up tightly against said ends and overlap said castings Fwithout clamping the axles in their bearings therein. The flanges f aresocketed somewhat to receive the adjacent ends of the castings F, whichare thus protected from dirt, allas shown in Fig. 4:. hen the bolt f isremoved, the disk and axle can be separated, and both removed from thebearing, as will be readily understood.

' The seat G is an ordinary seat, mounted on the frame-work A, for theconvenience of the driver or operator.

The construction and operation of the le- Ver H is a common one, and isreadily understood. It is pivoted to the vertical bar H on the end ofthe axle B, and the crank-arm on its lower end is connected by means ofalink h with a slide mounted thereon which carries the spindle for thefront staggered guidewheel 0. Said guide-wheel can thus be raised andlowered as desired.

The stay-rod I extends from the lower end of the vertical bar H on theaxle B, forward to a point near the front end of the frame A, and isfirmly secured to both. Centrally, it has a turn-bucklel' by which itslength and the position of that end of the axle B to which it isattached are varied, thus varying also the lead of the front staggeredguidewheel, as may be required by the varying sorts of work which theplow is required to do. The axle is capable of being rocked in itsbearings on the frame-work, and, as the bar H is generally securedfixedly thereto, the lengthening or shortening of the rodIby means ofthe turn-buckle I has this effect.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination, with a rotary plow, of a guide-wheel-mounted onaninclined shaft, secured to the rear end of the frame in position behindthe plowing disk and running in the last furrow plowed, and arranged toresist the side strain of the plowing disks, substantially as shown anddescribed.

2. The combination, with a rotary plow, of

a guide-wheel mounted at the rear end, and mountings therefor secured toa pivot, whereby said guide-wheel is enabled to swivel, in turning, likea caster-wheel and provided with engaging devices whereby it is held inline in ordinary operation, substantially as set forth.

3. The combination, with a rotary plow, of a rear guide-wheel, a bearingon the framework having raised portions on its face, an arm carrying theguide-wheel and having raised portions on its face, said two faces beingbrought together when the parts are assembled, and whereby they are heldto position in the usual operation of plowing, but are permitted toswivel on occasion,substantially as set forth.

4. The combination, with a rotary plow, of a rear guide-wheel, an arm onwhich it is mounted, and bearings onsaid arm and on said frame-workhaving corresponding raised portions or projections which fit betweeneach other, a pivot-bolt securing the two together, and a springsurrounding said pivot -bolt whereby they are held in forcible butyielding contact, substantially as set forth.

5. The combination, with a rotary plow, of the rear guide-wheel, aswinging arm on which the same is mounted, means whereby said arm isconnected to the frame-work, and a spring whereby said arm and theportion to which it is attached are held into forcible but yieldingcontact, substantially as set forth.

6. The combination, with a rotary plow, of

a guide-wheel secured to the rear end of the frame in position behindthe plowing disk, the

spindle of said guide-wheel being inclined slightly to the rear, wherebysaid guide-wheel 5 is given a lead opposite to the side pull of theplowing disk, substantially as shown and described.

7. The combination, in a rotary plow, of the frame A one beam whereofextends farther to the rear than the other, the axle B having theland-wheel B upon one end and the adjustable staggered guide-wheel uponthe other end, two or more plowing disks separately mounted upon the twobeams of the frame- 15 work, and a rear guide-wheel secured behind thewhole, substantially as shown and described.

S. The cornbination,in a rotary plow, of an axle having a vertical bar Hupon one end 20 carrying a guide-wheel or abearing therefor,

and a stay-rod I extending from said bar forward to the frame-work witha turn-buckle I therein, whereby it maybe adjusted, and the lead of theguide-wheel thus varied, substantially as set forth.

9. The combination, in a rotary plow, of a guide-wheel mounted at apoint to one side of the axis on the axle, and an adgustable stay-rodconnecting the hearing or support upon which it is mounted to theframework, whereby the lead maybe varied as required, substantially asset forth.

In witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, thls 18th day of October, A. D. 1892.

HILTON T. HANCOCK. [L 8.]

Vitnesses:

CHESTER BRADFORD, JAMES A. WALsH,

